How to Make It
Cook pasta in salted water according to package directions. Drain, reserving 3/4 cup cooking water.
Melt 1/4 cup butter in a large skillet over medium until sizzling. Add shallots, garlic, and chiles; cook, stirring often, until onions are softened, 3 to 4 minutes. Season with kosher salt to taste.
Add wine,and return to a simmer over medium-high. Continue to simmer, stirring occasionally, until reduced by about half, about 4 minutes. Stir in lemon juice, and return to a simmer; cook 1 to 2 minutes. Add crabmeat; gently toss to coat.
Add cooked pasta and remaining 1/4 cup butter. Cook, stirring and shaking skillet constantly, until butter melts and a sauce forms, 1 to 2 minutes. Add pea shoots, gently tossing until just wilted, adding 1/4 cup of the reserved cooking water at a time as needed to loosen sauce.
To serve, divide pasta mixture among 4 bowls. Top evenly with herbs, lemon zest, and flaky sea salt.